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JEE Main levelOne or more correct optionsDifficulty 2 of 3nm107

Select the correct statements about the IUPAC names of the compounds shown.

AThe compound $CH X_{3} - CH (OH) - CH X_{2} - CHO$ is 3-hydroxybutanal.
BThe compound $CH X_{3} - CO - CH X_{2} - CH X_{2} - OH$ is 4-hydroxybutan-2-one.
CThe compound $CH X_{3} CH X_{2} - COO - CH X_{3}$ is ethyl ethanoate.
DThe compound $H X_{2} N - CH X_{2} - CH X_{2} - CN$ is 2-aminopropanenitrile.

Answer: A, B

CH X_{3} CH (OH) CH X_{2} CHO

: aldehyde is C-1, OH on C-3, so 3-hydroxybutanal (true).

CH X_{3} COCH X_{2} CH X_{2} OH

: the ketone outranks the alcohol and gets C-2, so OH is on C-4 (true).

CH X_{3} CH X_{2} COOCH X_{3}

is methyl propanoate (false).

H X_{2} N - CH X_{2} - CH X_{2} - CN

has the CN carbon as C-1 and NH2 on C-3, so it is 3-aminopropanenitrile (false).

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